Repairing PCB on Truma Ultraheat S3004

[RapNap]

Can anyone advise me?
I have to remove the PCB from the control box at the bottom rear of my S3004 heater I am completely stumped as to how to disconnect the from the input end of the board the various (10 of them) wires which are held by sprung clips.
Has anyone on this forum done the same job?
How did you free these wires from the spring clips.
I am very tempted to cut through these wires and use traditional connector blocks when reinstalling the PCB, but there isn't enough surplus wire for me to risk getting this wrong.
My thanks in advance.

 

[Vanterrier]

Can you not just insert a fine screwdriver into the connector to release each wire in turn? If I am thinking about the same connectors its just about opening the clips enough to pull the wires out...
Apologies if I am on about something completely different
K

 

[Pudsey Bear]

Some help here hopefully.

Replacing PCB in ultraheat - DIY or garage?

Hi, my Truma UltraHeat S3004 has stopped working on 240v. Fine on Gas. Trips, fuses are all ok. Controller seems ok. How easy is it to remove the PCB and replace it? I've had a quick look ( after taking out the draws above the unit) the PCB appears to be inside a plastic box mounted on the...

www.motorhomefacts.com

 

[RapNap]

I just found the solution written by DGC188 on caravantalk.co.uk.
Equip yourself with a bladed screwdriver (4-6mm) or as in my case, a Torx scredriver.
Press down hard on the little plastic T-piece that juts out beside each socket on the Truma terminal block: the wire may now be easily withdrawn. It needs some force - I'd already tried pressing with my finger tips but that did not work.
Putting a screwdriver down the same hole as the wire works for some types of sprung terminal block, but not these.
Even less helpful was Truma's advice: "Insert a screwdriver blade into the hole beside each socket" - applicable to many types of these terminal blocks but not to Truma's, which doesn't have a hole.
Thanks to all you who answered my call for help.

 

[Pudsey Bear]

That's what we're here for, let us how you get on.

 

[RapNap]

That's what we're here for, let us how you get on.

Thanks: replacement relays & transformer kit ordered from Apuljack and new soldering iron tips from Amazon. Sometime next week I shall learn whether my soldering is up to scratch and if it is, will my Truma Ultraheat now work. Meanwhile my thanks to all on this forum and others I have consulted, also to Apuljack who helpfully supplied me with photos so that I could dismantle the control unit on my Ultraheat which, like them all, I believe, is situated almost at the very bottom of the rear of the heater, underneath the blown air fan and the fan motor, so very nearly invisible.

I'm going to submit an account of my experience to MMM in the hope that it will encourage my fellow motorhomers to get out there and DIY instead of paying a lot of money to dealers for what is chiefly the labour of moving everything out of the way to get at the control panel. It won't have many pictures - after all, it wasn't until I finally moved the last of the blown air ducting out of the way that I was even able to see what I needed to get at!